121020211 has 8 divisors (see below), whose sum is σ = 131269040. Its totient is φ = 110905632.

The previous prime is 121020209. The next prime is 121020241. The reversal of 121020211 is 112020121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121020211 - 2¹ = 121020209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31680 + ... + 35293.

It is an arithmetic number, because the mean of its divisors is an integer number (16408630).

Almost surely, 2^121020211 is an apocalyptic number.

121020211 is a deficient number, since it is larger than the sum of its proper divisors (10248829).

121020211 is a wasteful number, since it uses less digits than its factorization.

121020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67125.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121020211 is about 11000.9186434588. The cubic root of 121020211 is about 494.6362814621.

Adding to 121020211 its reverse (112020121), we get a palindrome (233040332).

The spelling of 121020211 in words is "one hundred twenty-one million, twenty thousand, two hundred eleven".